forgot one...

oasis-open · Nov 19, 2020 · e7242c9 · e7242c9
1 parent 49985cc
commit e7242c9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/stix2/v21/observables.py b/stix2/v21/observables.py
@@ -937,6 +937,7 @@ def CustomObservable(type='x-custom-observable', properties=None, id_contrib_pro
     def wrapper(cls):
         _properties = list(itertools.chain.from_iterable([
             [('type', TypeProperty(type, spec_version='2.1'))],
+            [('spec_version', StringProperty(fixed='2.1'))],
             [('id', IDProperty(type, spec_version='2.1'))],
             properties,
             [('extensions', ExtensionsProperty(spec_version='2.1', enclosing_type=type))],